function showTab(objval,name,n,cat){
	var boardTab = new Array();
	var boardArea = new Array();
	for(var i=1;i<=n;i++){
		boardTab[i]=""+name+"Tab"+i;
		boardArea[i]=""+name+"Top0"+i;
	}	
		switch (objval)
		{
			case 1: {
				document.getElementById(boardTab[1]).className=cat+'class';
				document.getElementById(boardTab[2]).className=cat+'unnews';
				document.getElementById(boardArea[1]).style.display="";
				document.getElementById(boardArea[2]).style.display="none";
				break;
			}
			case 2: {
				document.getElementById(boardTab[1]).className=cat+'unclass';
				document.getElementById(boardTab[2]).className=cat+'news';
				document.getElementById(boardArea[1]).style.display="none";
				document.getElementById(boardArea[2]).style.display="";
				break;
			}
		}
}